This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A049280 #1 Dec 11 1999 03:00:00 %S A049280 0,1,1,1,1,2,1,3,2,1,4,5,1,5,9,5,1,6,14,14,1,7,20,28,14,1,8,27,48,42, %T A049280 1,9,35 %N A049280 Essentially same as A008315. %K A049280 dead %O A049280 0,6